I believe the answer is "b", sorry if i am incorrect.
Answer:
C. The destruction of trading routes in Eurasia
Explanation:
This had a long term effecf inEurasia because mongolians were constantly invading cities and when the came to Eurasia they destroyed trading routes by killing and overpowering the cities turning it into a empire.
The Development of the Middle Class and Working Class.
C. CMB is remnant radiation from the Big Bang
B. CMB is uniformly distributed and of a uniform temperature across the universe.
Mark me as brainliest
